<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.jpg" alt />
      </div>
      <!-- 表单区 -->
      <el-form
        label-width="0px"
        class="login_form"
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
        @keyup.enter.native="handleSubmit"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            prefix-icon="el-icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            placeholder="请输入密码"
            prefix-icon="el-icon-lock"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区 -->
        <el-form-item class="btns">
          <el-button type="success" @click="login">登录</el-button>
          <el-button type="info" @click="loginFormReset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'login',
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          { required: true, message: '用户名不能为空！', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '密码不能为空！', trigger: 'blur' },
          { min: 6, max: 9, message: '长度在 6 到 9 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    loginFormReset() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) {
          return ''
        } else {
          const { data: res } = await this.$http.post(
            'user/login',
            this.loginForm
          )
          if (!res.flag) {
            this.$message.error(res.msg)
          } else {
            this.$message.success(res.msg)
            window.sessionStorage.setItem('token', '')
            this.$router.push('/home')
          }
        }
      })
    },
    // 登录调用的方法
    handleSubmit() {
      // 验证及验证之后的跳转
      this.login()
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #373d41;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 100px;
    width: 100px;
    border-radius: 50%;
    padding: 10px;
    border: 1px solid #eee;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.btns {
  display: flex;
  justify-content: end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
